Can children safely take GenF20 Plus? Always with children, first please check with a Doctor before using ANY product like this one. It's just common sense! As HGH is the body's own by whoever produces it inside their own body, these HGH levels don't start to drop off until your 20s. If you alter your child's natural production of HGH levels before this timeline it could affect their overall development and growth factors! So please..... talk with your Doctor first!